The Natures Way Bamboo Vertical Wave Bird Feeder 2 qt (BWF5) features an extended seed tray to allow large birds to feed. It has a clear view of the seeds you put in so you will know when it's time to fill it all up again. It holds 2 quarts of seed (mixed or regular). You can use sunflower seeds in this feeder or the mixed ones. It will attract Cardinals, Grosbeaks, Chickadees, Finches and more. It features a water based protective stain. It has double defense against rotting, warping, shrinking and swelling. It has elevated mesh floors and It features durable rust free galvanized wire mesh and the predator guard will help protect your birds against predators. It has clean out doors that gives you the convenience of easy bird viewing and cleaning. Created from a solid cross-ply bamboo that has stainless steel screws, this bird feeder is durable. It has air vents to allow for great ventilation through wall and floor openings. The solid cross-ply bamboo construction is resistant to mold and bacteria that can harm the birds.